//
// Created by rick on 02-02-21.
//

#ifndef NEW_KERNEL_PCI_H
#define NEW_KERNEL_PCI_H

#include <types.h>

#define PCI_CLASS_MASS_STORAGE 0x01

// class MASS STORAGE 1
#define PCI_SUB_CLASS_IDE 0x01

#define PCI_REGISTER_OK         0
#define PCI_REGISTER_ERR_FULL   (-1)

#define PCI_VALIDATE_OK     0
#define PCI_VALIDATE_FAIL   1

#define PCI_INIT_OK     0
#define PCI_INIT_FAIL   1

typedef struct pci_driver pci_driver;
typedef struct pci_device pci_device;

typedef u8 (*pci_driver_validate)(const pci_device *);
typedef u8 (*pci_driver_initialize)(const pci_device *);

typedef struct pci_driver {
    const char *name;
    const char *description;
    u8 order;
    u8 pci_class;
    u8 pci_subclass;
    struct {
        u8 pci_use_subclass: 1;
    };
    pci_driver_validate validate;
    pci_driver_initialize initialize;
} pci_driver;

typedef struct pci_device {
    u8 bus;
    u8 slot;
    u8 func;
    union {
        struct {
            u16 vendorId;
            u16 deviceId;
        };
        u32 config_line_0;
    };
    union {
        struct {
            u8 revisionId;
            u8 programInterface;
            u8 subclass;
            u8 class;
        };
        u32 config_line_2;
    };
    union {
        struct {
            u8 cacheLineSize;
            u8 latencyTimer;
            u8 headerType;
            u8 bist;
        };
        u32 config_line_3;
    };
    const pci_driver *pci_driver;
    struct {
        u8 present: 1;
    } device_state;
    struct {
        u8 initialized: 1;
    } driver_state;
} pci_device;

void pci_print_info();

u32 pci_register_driver(const pci_driver *pci_driver);

void pci_sort_drivers();

void pci_init_drivers();

void pci_scan();

#endif //NEW_KERNEL_PCI_H